import axios from 'axios'
import { MessageBox, Message, Loading } from 'element-ui'
import store from '@/store'
import { TokenKey, getToken, getFullToken, getSessionId } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { tansParams, blobValidate } from '@/utils/hongke'
import { saveAs } from 'file-saver'

const isUM = window.loginType === 'UM'

const SUCCESS_CODE = 200
const REDIRECT_CODE = 201
const UNLOGIN_CODE = 1003
const AUTH_REDIRECT = 1004
const LOGIN_VALID_CODE = 1006
const SERVER_ERROR_CODE = 500

let downloadLoadingInstance
// 是否显示重新登录
export const isRelogin = { show: false }

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  // baseURL: window.baseUrl,
  // 超时
  timeout: 60000
})

// request拦截器
service.interceptors.request.use(
  (config) => {
    // 是否需要设置 token
    const isToken = (config.headers || {}).isToken === false
    const token = isUM ? getFullToken() : getToken()
    if (token && !isToken) {
      // 让每个请求携带自定义token 请根据实际情况自行修改
      if (isUM) {
        const { access_token, refresh_token, expires_in, sid } = token
        config.headers['Authorization'] = `Bearer ${access_token}`
        config.headers['refresh_token'] = refresh_token
        config.headers['expires_in'] = expires_in
        config.headers['sid'] = getSessionId() || sid
      } else {
        config.headers[TokenKey] = token
      }
    }

    config.headers['X-Referer'] = window.location.href
    return config
  },
  (error) => {
    console.log(error)
    Promise.reject(error)
  }
)

// 响应拦截器
service.interceptors.response.use(
  (res) => {
    // 未设置状态码则默认成功状态
    const code = res.data.code || SUCCESS_CODE
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode['default']
    // 数据直接返回
    if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer' || code === REDIRECT_CODE) {
      return res.data
    }

    switch (code) {
      case SUCCESS_CODE:
        return res.data.data
      case UNLOGIN_CODE:
        handleSessionExpire()
        return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
      case AUTH_REDIRECT:
        location.href = res.data.msg
        break
      case LOGIN_VALID_CODE:
        return Promise.reject(msg)
      case SERVER_ERROR_CODE:
        msgError(msg)
        return Promise.reject(new Error(msg))
      case 401:
        if (isUM) {
          msgError(msg)
        }
        return Promise.reject(new Error(msg))
      default:
        msgError(msg)
        return Promise.reject('error')
    }
  },
  (error) => {
    console.log('err' + error)
    let { message } = error
    if (message === 'Network Error') {
      message = '后端接口连接异常'
    } else if (message.includes('timeout')) {
      message = '系统接口请求超时'
    } else if (message.includes('Request failed with status code')) {
      message = '系统接口' + message.substr(message.length - 3) + '异常'
    }
    msgError(message)
    return Promise.reject(error)
  }
)

// export default service
export default function request(data) {
  // get请求映射params参数
  if (data.method === 'get' && data.params) {
    let url = data.url + '?' + tansParams(data.params)
    url = url.slice(0, -1)
    data.params = {}
    data.url = url
  }
  return service(data)
}

export function get(url, params) {
  return request({
    url: url,
    params,
    method: 'get'
  })
}
export function DELETE(url, params) {
  return request({
    url: url,
    params,
    method: 'DELETE'
  })
}

// get 请求下载
export function downLoadFile(url, params) {
  return request({
    method: 'get',
    url: url,
    params: params,
    headers: { 'Content-Type': 'application/json,charset=utf-8' },
    responseType: 'arraybuffer' // 二进制流
  })
}

export function post(url, params) {
  return request({
    url: url,
    data: params,
    method: 'post'
  })
}

export function postWithUnAuth(url, params) {
  return request({
    url: url,
    headers: { isToken: false },
    data: params,
    method: 'post'
  })
}

// 通用下载方法
export function download(url, params, filename, type) {
  downloadLoadingInstance = Loading.service({
    text: '正在下载数据，请稍候',
    spinner: 'el-icon-loading',
    background: 'rgba(0, 0, 0, 0.7)'
  })
  return service
    .post(url, params, {
      transformRequest: [
        (params) => {
          if (!type) {
            return tansParams(params)
          } else {
            return JSON.stringify(params)
          }
        }
      ],
      headers: { 'Content-Type': 'application/json' },
      responseType: 'blob'
    })
    .then(async (data) => {
      const isLogin = await blobValidate(data)
      if (isLogin) {
        const blob = new Blob([data])
        saveAs(blob, filename)
      } else {
        const resText = await data.text()
        const rspObj = JSON.parse(resText)
        const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
        msgError(errMsg)
      }
      downloadLoadingInstance.close()
    })
    .catch((r) => {
      console.error(r)
      msgError('下载文件出现错误，请联系管理员！')
      downloadLoadingInstance.close()
    })
}

// 通用下载方法 get请求
export function gDownload(url, params, filename) {
  downloadLoadingInstance = Loading.service({
    text: '正在下载数据，请稍候',
    spinner: 'el-icon-loading',
    background: 'rgba(0, 0, 0, 0.7)'
  })
  return downLoadFile(url, params)
    .then(async (data) => {
      const isLogin = await blobValidate(data)
      if (isLogin) {
        const blob = new Blob([data])
        saveAs(blob, filename)
      } else {
        const resText = await data.text()
        const rspObj = JSON.parse(resText)
        const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
        Message.error(errMsg)
      }
      downloadLoadingInstance.close()
    })
    .catch((r) => {
      console.error(r)
      Message.error('下载文件出现错误，请联系管理员！')
      downloadLoadingInstance.close()
    })
}

export function upload(url, params) {
  return service({
    method: 'post',
    url: url,
    headers: {
      'Content-Type': 'multipart/form-data'
    },
    transformRequest: [
      function () {
        return params
      }
    ],
    params: params
  })
}

function handleSessionExpire() {
  if (!isRelogin.show) {
    isRelogin.show = true
    MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
      confirmButtonText: '重新登录',
      cancelButtonText: '取消',
      type: 'warning'
    })
      .then(() => {
        isRelogin.show = false
        if (!isUM) {
          store.dispatch('LogOut').then(() => {
            location.href = '/'
          })
        } else {
          store.dispatch('LogOut').then(() => {
            store.dispatch('GetInfo')
          })
        }
      })
      .catch(() => {
        isRelogin.show = false
      })
  }
}

function msgError(msg) {
  Message({
    message: msg,
    type: 'error'
  })
}
